表面技术2025，Vol.54Issue(17)：104-116,13.DOI:10.16490/j.cnki.issn.1001-3660.2025.17.009
不同轧制温度对医用Zn-Li-Er合金组织及磨损行为的影响
Effect of Different Rolling Temperatures on Microstructure Characteristics and Wear Behavior of Medical Zn-Li-Er Alloys
摘要
Abstract
Under the clinical service conditions,medical metallic materials not only bore the combined erosion of complex physiological factors,but also suffer from non-linear mechanical wear caused by the dynamic load of human bones.This can easily cause accelerated-loss of material components and a sharp reduction in service life.Moreover,the fine particles formed by the interaction of biological corrosion and micro-sliding wear were prone to trigger joint inflammation and pathological reactions,which seriously threatened the safety of implants.Therefore,the purpose of this paper was to optimize the wear resistance of medical Zn-Li-Er alloy by hot rolling deformation under simulated body fluid environment,explore the corrosion wear mechanism of implanted zinc,and realize controllable biodegradation.A new medical rare earth zinc alloy was prepared by vacuum melting and homogenization treatment.Before the experiment,the sample was heated to 320 ℃ in a box furnace and kept at that temperature for 2 hours.The sample was subjected to small deformation and multi-pass rolling on the rolling-mill.The rolling speed was 20 m/min.The single deformation was 2 mm,and the heating furnace was kept at temperature for 5 minutes between each pass.The experimental samples were prepared by electrospark erosion wire cutting machine.The microstructure and phase composition were observed by Leica Dmi8 optical microscope,Phenom XL desktop scanning electron microscope,and X-ray diffraction(XRD,D/MAX2500PC).The mechanical properties and hardness were determined by UTM 5305 tensile tester and HV-5SPTA Vickers hardness tester.The friction coefficient of the medical zinc alloy at different rolling temperatures was obtained by the multifunctional material surface property tester(MFT-4000),and the wear quality was obtained by measuring the mass before and after the test.Then the 3D morphology of the wear mark was analyzed by the laser confocal analyzer(LSM 800).As the hot rolling temperatures increased(240,280,320,360 ℃),the grain size of the medical Zn-Li-Er alloy gradually increased,the number of second phases decreased.And the wear resistance performance showed a trend of first increasing and then decreasing in the Hanks' simulated body fluid environment,the wear rates were 0.89× 10-3,0.75×10-3,0.69×1 0-3,0.73× 10-3 g/(N·m),respectively.On the one hand,the higher hardness structure will reduce the local deformation defects in the wear contact area and reduce the wear of hard spalling particles on the matrix.It can also reduce the channels for active ion penetration and inhibit the galvanic corrosion.On the other hand,the appropriate high temperature will dissolve more second phases/intermetallic compounds into the matrix,reduce the cleavage effect of the second relative to the matrix.It can also reduce the stress concentration around the second phase/peripheral interface during the wear process,thus delaying the rupture speed of the matrix.The grain size and distribution of Zn-0.8Li-0.15Er alloy can be effectively regulated by controlling the rolling temperature.The results indicate that hot-rolling alloy at 320 ℃ significantly improves its deformation resistance,reduces stress concentration,and delays the fatigue failure of zinc alloy in simulated body fluid environment.关键词
医用锌合金/腐蚀磨损/抗磨损能力/高硬度组织/解理效应Key words
medical zinc alloys/corrosion wear/wear resistance/high-hardness tissue/cleavage effect分类
矿业与冶金引用本文复制引用
张源,杨煜卓,刘芸,田亚强,陈连生..不同轧制温度对医用Zn-Li-Er合金组织及磨损行为的影响[J].表面技术,2025,54(17):104-116,13.基金项目
河北省中央引导地方科技发展资金项目(226Z1004G) （226Z1004G）
河北省自然科学基金(E2024209059) （E2024209059）
华北理工大学医工融合项目(ZD-YG-202427) （ZD-YG-202427）
河北省省属高校基本科研业务费(JJC2024080)Hebei Province Central Guiding Local Science and Technology Development Fund Project(226Z1004G) （JJC2024080）
Hebei Natural Science Foundation(E2024209059) （E2024209059）
Key Project of Medicine and Engineering Integration of North China University of Science and Technology(ZD-YG-202427) （ZD-YG-202427）
Basic Research Expenses of Provincial Colleges and Universities(JJC2024080) （JJC2024080）
